Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Improved retractable bollard
A retractable bollard comprising: an embedded outer housing having an open end and a closed end; a ram slideably mounted within the outer housing; and means for injecting fluid into, and means for removing fluid from, a chamber within the retractable bollard to move the ram relative to the outer housing between a retracted position and an extended position; wherein: the chamber is bounded by one or more sliding surfaces and one or more seals configured to move in sealing relationship relative to the sliding surfaces; and the ram is able to be completely removed from the outer housing without separating the seals from the sliding surfaces.
Improved retractable bollard
A retractable bollard comprising: an embedded outer housing having an open end and a closed end; a ram slideably mounted within the outer housing; and means for injecting fluid into, and means for removing fluid from, a chamber within the retractable bollard to move the ram relative to the outer housing between a retracted position and an extended position; wherein: the chamber is bounded by one or more sliding surfaces and one or more seals configured to move in sealing relationship relative to the sliding surfaces; and the ram is able to be completely removed from the outer housing without separating the seals from the sliding surfaces.
Improved retractable bollard
BROADHURST ROBERT CHARLES (Autor:in)
20.09.2018
Patent
Elektronische Ressource
Englisch
IPC:
E01F
ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
,
Zusätzliche Baumaßnahmen, wie die Ausstattung von Straßen oder die bauliche Ausbildung von Bahnsteigen, Landeplätzen für Hubschrauber, Wegweisern, Schneezäunen oder dgl.